Guanidine nitrate formamide metal ion complex and preparation method thereof
Technical Field
The invention relates to the technical field of energetic materials, in particular to a guanidine nitrate formamide metal ion complex and a preparation method thereof.
Background
Guanidine Nitrate (GN) is an energetic material, the appearance of which is mostly white crystal powder or particles, and is an important constituent substance of explosives and rocket propellants. The guanidine nitrate is synthesized by taking dicyandiamide and ammonium nitrate as raw materials, synthesizing the materials at 180-205 ℃, crystallizing and slicing the materials to obtain the guanidine nitrate, wherein the reaction temperature is high, the danger of the raw materials is high, researches on Ivan V, mendenhall (US, 20050098246) and the like find that excessive metal oxides such as manganese oxide and ferric oxide can improve the performance of energetic materials, and Han Zhiyue (weapon equipment engineering journal, 2018,39 (5): 172-178.) finds that the introduction of oxygen atoms into the molecules of azoles, guanidine and oxazine can improve the performance, but the problem of poor stability still exists.
Disclosure of Invention
The invention aims to solve the defects in the prior art, and provides a guanidine nitrate formamide metal ion complex and a preparation method thereof.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
A guanidine nitrate formamide metal ion complex, the guanidine nitrate formamide metal ion complex has the following structure:
in the structure, R is a transition metal 2-valent cation.
Preferably, the R includes one of Mn 2+、Fe2+、Co2+、Cu2+、Zn2+.
The preparation method of the guanidyl formamide nitrate metal ion complex comprises the following steps:
Step1, mixing dicyandiamide and water (35% -45%) in a proportion of (65% -55%), heating, dropwise adding nitric acid, continuously stirring for 1-1.5 h after dropwise adding, and cooling to room temperature to obtain a guanidyl formamide nitrate solution;
Step 2, adding carbonate of R into guanidyl formamide acid solution at 30-40 ℃ for 1-3 hours, heating to 50-100 ℃ and continuing to react for 2-12 hours;
Step 3, filtering while the reaction is hot after the reaction is finished;
And 4, carrying out vacuum drying on the filtered product to obtain the guanidine nitrate formamide metal ion complex.
Preferably, the carbonate salt of R in step 2 is technical grade, with a purity of 99%.
Preferably, the nitric acid in the step 1 is fuming nitric acid, and the adding amount of fuming nitric acid is 2.05-2.2 of the molar mass of the carbonate of R.
Preferably, the heating temperature in step 1 is 50 ℃ to 100 ℃.
Preferably, the molar ratio of guanidino carboxamide nitrate to R carbonate in step 2 is 2 (1-1.3).
Preferably, in step 3, the filtration temperature is 50 ℃ to 70 ℃.
Preferably, in step 4, the drying temperature is 50 ℃ to 70 ℃.
Preferably, in the preparation method of the guanidine nitrate formamide metal ion complex, the chemical reaction formula is as follows:
。
Preferably, the preparation method of the guanidine nitrate formamide metal ion complex of the invention limits the adding amount of fuming nitric acid to 2.0-2.2 of the molar mass of the carbonate of R, and ensures that dicyandiamide can be hydrolyzed to generate guanidine nitrate formamide as much as possible under an acidic environment, and simultaneously ensures that the carbonate of R can be completely reacted as much as possible, thereby ensuring that more metal cations carry out complexation reaction.
The beneficial effects of the invention are as follows:
1. the guanidine nitrate formamide metal ion complex has higher burning rate and gas production efficiency.
2. The guanidine nitrate formamide metal ion complex has low sensitivity and good stability.
3. The preparation method of the guanidine nitrate formamide metal ion complex has the advantages of simple process, mild condition, easy preparation, low safety and stability risk of raw materials and low equipment requirement.
Detailed Description
The following description of the technical solutions in the embodiments of the present invention will be clear and complete, and it is obvious that the described embodiments are only some embodiments of the present invention, but not all embodiments.
Example 1:
The guanidine nitrate formamide ferrous ion complex has the following structure:
the preparation method of the guanidyl formamide ferrous nitrate ion complex comprises the following steps:
0.5kg of dicyandiamide and 4.5kg of water are heated to 70 ℃, 0.43kg of fuming nitric acid is added dropwise after complete dissolution, and stirring is continued for 1h after the dropwise addition. When the temperature was lowered to 30 ℃, 0.38kg of ferrous carbonate was added, and the addition was completed within 1 hour. Raising the temperature of the system to 85 ℃, reacting for 5 hours, stopping heating, cooling the system to 50 ℃, filtering while the system is hot, and vacuum drying at 60 ℃ to obtain 1.04kg of guanidyl formamide ferrous ion complex nitrate, wherein the yield (calculated by guanidyl formamide nitrate) is 91.0%.
Example 2:
The guanidine nitrate formamide ferrous ion complex has the following structure:
The preparation method of the guanidyl formamide manganese nitrate ion complex comprises the following steps:
0.8 kg dicyandiamide and 7.2kg water are heated to 60 ℃, 0.67kg fuming nitric acid is added dropwise after complete dissolution, and stirring is continued for 1.2h after the dropwise addition. When the temperature was reduced to 35 ℃, 0.59kg of manganese carbonate was added, and the addition was completed within 1.5 hours. Raising the temperature of the system to 75 ℃, reacting for 3.5 hours, stopping heating, cooling the system to 50 ℃, filtering while the system is hot, and drying in vacuum at 55 ℃ to obtain 1.69kg of guanidyl formamide manganese nitrate ion complex, wherein the yield (calculated by guanidyl formamide nitrate) is 92.7%.
Example 3:
The guanidine nitrate formamide ferrous ion complex has the following structure:
the preparation method of the guanidyl formamide cobalt ion complex comprises the following steps:
0.4kg of dicyandiamide and 2.1kg of water are heated to 65 ℃, 0.35kg of fuming nitric acid is added dropwise after complete dissolution, and stirring is continued for 1.2h after the dropwise addition. When the temperature was lowered to 32 ℃, 0.32kg of cobalt carbonate was added, and the addition was completed within 1.5 hours. Raising the temperature of the system to 85 ℃, reacting for 6 hours, stopping heating, cooling the system to 60 ℃, filtering while the system is hot, and vacuum drying at 65 ℃ to obtain 0.83kg of guanidyl formamide ferrous cobalt nitrate complex, wherein the yield (calculated by guanidyl formamide nitrate) is 90.5%.
Example 4:
The guanidine nitrate formamide ferrous ion complex has the following structure:
The preparation method of the copper ion complex of guanidine nitrate formamide comprises the following steps:
1kg of dicyandiamide and 4kg of water are heated to 80 ℃, 0.94kg of fuming nitric acid is added dropwise after complete dissolution, and stirring is continued for 1.5h after the dropwise addition. When the temperature was reduced to 40 ℃, 0.88kg of copper carbonate was added, and the addition was completed within 2 hours. Raising the temperature of the system to 95 ℃, reacting for 7h, stopping heating, cooling the system to 65 ℃, filtering while the system is hot, and vacuum drying at 70 ℃ to obtain 2.09kg of copper ion complex of guanidyl formamide nitrate, wherein the yield (calculated by guanidyl formamide nitrate) is 89.6%.
Example 5:
The guanidine nitrate formamide ferrous ion complex has the following structure:
the preparation method of the guanidine nitrate formamide zinc ion complex comprises the following steps:
1.2kg of dicyandiamide and 6.3kg of water are heated to 75 ℃, 1.28kg of fuming nitric acid is added dropwise after complete dissolution, and stirring is continued for 1h after the dropwise addition. When the temperature was reduced to 30 ℃, 1.16kg of zinc carbonate was added over 2 hours. Raising the temperature of the system to 98 ℃, reacting for 8 hours, stopping heating, cooling the system to 65 ℃, filtering while the system is hot, and drying in vacuum at 70 ℃ to obtain 2.43kg of guanidyl formamide zinc nitrate ion complex, wherein the yield (calculated by guanidyl formamide) is 86.6%.
The main infrared absorption peaks of the guanidine nitrate formamide metal ion complex are shown in table 1:
the foregoing is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should make equivalent substitutions or modifications according to the technical scheme of the present invention and the inventive concept thereof, and should be covered by the scope of the present invention.